Merge branch 'v3' of github.com:dcloudio/uni-app into v3

packages/vue-cli-plugin-hbuilderx/build/webpack.nvue.conf.js

@@ -39,6 +39,7 @@ const uniPath = process.env.UNI_USING_V8
 const provide = {}
 
 if (process.env.UNI_USING_V3 || process.env.UNI_USING_NATIVE) {
+  provide['uni.getCurrentSubNVue'] = [path.resolve(__dirname, '../packages/uni-app-plus-nvue/dist/get-current-sub-nvue.js'), 'default']
   provide['uni.requireNativePlugin'] = [path.resolve(__dirname, '../packages/uni-app-plus-nvue/dist/require-native-plugin.js'), 'default']
 }
 

packages/vue-cli-plugin-hbuilderx/packages/uni-app-plus-nvue/dist/get-current-sub-nvue.js

+export default function getCurrentSubNVue() {
+  return uni.getSubNVueById(plus.webview.currentWebview().id)
+}